OFFSET
1,3
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..1000
A. C. Zorach, Additive triangle
EXAMPLE
a(8)=1 since 8 appears in the first (i.e. left hand) column.
PROG
(Haskell) -- See link.
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Jun 07 2002
STATUS
approved